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Cause: A lock taken during a master map re-read was
not being held long enough and was being taken
unnecessarily for map reads as well.
Consequence: The original lookup can't complete
causing autofs to hang.
Fix: Fixed by correcting the locking of master map
and map reads.
Result: autofs no longer hangs due to map dependencies.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2018:0977
Created attachment 1336147 [details] Patch - only take master map mutex for master map update